On the other hand, most 32-bit apps have newer 64-bit versions available. Any developer yet to update their app to work in the new version of macOS is running out of time and we would guess isn’t planning to do anything. If they aren’t, it’s probably time to consider switching to a more modern app. Those developers who don’t yet have 64-bit versions of their apps will probably be working on the transition from 32-bit. Similarly, you will have been seeing warnings about apps that are “not optimised for your Mac” or “This app needs to be updated by its developer to improve compatibility” for at least a year. Apple has been warning developers of the move away from 32-bit apps for a few years now. You might want to drop them a line to plead with them to do so. You may be hoping that the developer will update your app to make it compatible. How to dual boot your Mac to run both Catalina and Mojave. You could run an older version of macOS alongside Catalina.You’ll still be able to run Mojave and the app, but there could be security issues in the future that you won’t be protected from. Also, if you decide not to update to Catalina so you can continue to use the 32-bit apps note that Apple could stop supporting Mojave as early as 2020, and since that’s the last OS to support 32-bit, that’s basically the end of any form of support for 32-bit apps on a Mac.This won’t be an option if you are buying a new Mac though. You could just decide not to upgrade your Mac to Catalina.If the app developer hasn’t updated the app – perhaps they went out of business or just stopped development in that particular area – you could find an alternative app that does work in Catalina.You’ll probably have to accept that there’s a need to pay for the update, or look for an alternative app. It’s likely that the developer has since updated the app so that it uses 64-bit code, and meets other requirements of Apple. Upgrade to a newer version of the app.If an app you rely on isn’t supported in Catalina, you’ve got a few choices: What to do if your app doesn’t work in Catalina ![]() We have further information for those who would like to read more aboutĪpple’s ‘Not Optimized for your Mac’ warning. If a 64-bit app is from an ‘Identified Developer’, ‘Mac App Store’ or ‘Apple’ then there should be no issues, but if it says ‘Unknown’ you may experience problems with it in the future. Also note whether the app is ‘Obtained from’ in that column.You could sort by that column to make it easier to see at a glance the apps that aren’t going to be supported by macOS Catalina when it launches in September 2019. Look to see whether the apps you use are listed as 64-bit application in the final column. ![]()
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